An excellent sky you had for a day you didn't think was what you wanted. :-) You do have a bit of sharpening halo thing going on - there was a tip that Joe Dannels posted just a little while ago. For DPC purposes (or web display in general), don't sharpen the full sized image - resize to about twice your final desired size or a bit more (1400 pixels on the long side or so for here), use Photoshop's "sharpen" tool (just plain "Sharpen") one to three times, then resize for the websize you want.
Cool shot. Looks like its already being printed :) Almost thought the last two spines on the far left were a couple. Would have been cool to have had a couple down there or something :)